/****************************************************************************
 * Copyright (c) 2017 liangxie
 * 
 * http://qframework.io
 * https://github.com/liangxiegame/QFramework
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 ****************************************************************************/

namespace QF
{
    using System.Collections.Generic;

    public abstract class Pool<T> : IPool<T>,ICountObserveAble
    {
        #region ICountObserverable
        /// <summary>
        /// Gets the current count.
        /// </summary>
        /// <value>The current count.</value>
        public int CurCount
        {
            get { return mCacheStack.Count; }
        }
        #endregion
        
        protected IObjectFactory<T> mFactory;

        protected readonly Stack<T> mCacheStack = new Stack<T>();

        /// <summary>
        /// default is 5
        /// </summary>
        protected int mMaxCount = 12;

        public virtual T Allocate()
        {
            return mCacheStack.Count == 0
                ? mFactory.Create()
                : mCacheStack.Pop();
        }

        public abstract bool Recycle(T obj);
    }
}